. >>> this morning we're learning more about the departure of david petraeus. the retired general resigned friday after publicly admitting to an extra marital affair. and for the anywaying's top spy, it was a breach of trust he called unacceptable. brian moore has the latest from washingto washington. >> petraeus has washington asking how and why. and the woman suddenly in the spotlight, paula broadwelsh isn't saying. back in january she was promoting a book on the general. >> he absolutely loves the agency. i think it's a great place for him. >> broadwell, an army reserve officer, had close access to the cia director. federal agents are investigating whether she had access to his e-mails or computer. >> my understanding is that the fbi's investigation into what took place on computers there did not necessarily focus on him. that came by the information by accident. >> law enforcement and multiple u.s. sources tell nbc news that e-mails between general petraeus and paula broadwell were indicative of an extra marital affair. nbc news tried but was unable to reac